The "You Oughta Know" singer, 39, and Mario "Souleye" Treadway have been sued by former nanny Bianca Cambeiro, who alleges, according to court documents filed on Thursday, that the couple never paid her overtime or allowed her to take meal or rest breaks during her regular 12-hour shifts while caring for the couple's son Ever three to four days a week.

The documents state that Cambeiro, who started working for the couple in August 2011 at their Brentwood, Calif., home for $25 an hour, asked Morrissette's accountant in January 2012 why she wasn't being paid overtime, and he said, "We don't do that."

Cambeiro claims she was prohibited from leaving the bedroom of the baby – who was born on Christmas Day 2010 – while the child was sleeping until and unless one of the parents were in the room or until the day shift nanny arrived to relieve her.

According to the documents, the former nanny seeks no less than $100,000 for a list of reasons, including emotional distress, attorney fees and lost wages. As a non-exempt employee who worked for more than 10 hours per day, she claims she was legally entitled to a minimum of two 30-minute meal breaks each shift.